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Single-walled carbon nanotubes prepared in small AlPO4-5 and CoAPO-5 molecular sieves by low-temperature hydrocracking
Yang, Wenshen1; Sun, Weina1,2; Zhao, Shuheng1,2; Yin, Xiuli1
2016
发表期刊MICROPOROUS AND MESOPOROUS MATERIALS
卷号219页码:87-92
摘要Single-walled carbon nanotubes (SWNTs) were prepared in the channels of small AlPO4-5 and cobalt-incorporated AlPO4-5 (CoAPO-5) crystals (4-6 mu m in diameter and 10-30 mu m in length), by hydrocracking at 350 degrees C. The effects of Co content in the precursor gel and carbon density of the structure-directing agent on the resulting SWNTs were investigated. The results of high-resolution transmission electron microscopy and polarized Raman scattering indicated that SWNTs formed in the channels of AlPO4-5 and CoAPO-5 crystals, after hydrocracking for 10 h at 350 degrees C. The SWNTs were 0.4 nm in diameter, and possessed well-defined symmetry. When the Co/Al ratio of the precursor gel was 0.075, the relative intensity ratio of Raman D to G band (ID/IG) was 0.286, and the weight loss (500-700 C) of the SWNTs formed in CoAPo-5 was 3.27 wt%. This Co/Al ratio yielded the lowest obtained I-D/I-G value and the highest weight loss of SWNTs, which indicated the lowest amorphous carbon density and the highest SWNT quantity. The density and quantity of SWNTs in the AlPO4-5 crystals increased when the structure-directing agent was changed from triethylamine to tripropylamine, because of the higher carbon content of the latter's unit cell. Low-temperature hydrocracking can be used to prepare SWNTs in the channels of AlPO4-5 and CoAPO-5 crystals, even for small low-quality crystals. (C) 2015 Elsevier Inc. All rights reserved.
文章类型Article
关键词Single-walled Carbon Nanotubes Hydrocracking Coapo-5 Crystals Radial Breathing Mode Co/al Ratio
WOS标题词Science & Technology ; Physical Sciences ; Technology
DOI10.1016/j.micromeso.2015.06.036
研究领域[WOS]Chemistry ; Science & Technology - Other Topics ; Materials Science
关键词[WOS]CHANNELS ; CRYSTALS ; GROWTH ; DECOMPOSITION ; MECHANISM ; TEMPLATE
收录类别SCI
语种英语
WOS类目Chemistry, Applied ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS记录号WOS:000363353800012
引用统计
被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.giec.ac.cn/handle/344007/10880
专题中国科学院广州能源研究所
作者单位1.Chinese Acad Sci, Guangzhou Inst Energy Convers, CAS Key Lab Renewable Energy, Guangzhou 510640, Guangdong, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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Yang, Wenshen,Sun, Weina,Zhao, Shuheng,et al. Single-walled carbon nanotubes prepared in small AlPO4-5 and CoAPO-5 molecular sieves by low-temperature hydrocracking[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2016,219:87-92.
APA Yang, Wenshen,Sun, Weina,Zhao, Shuheng,&Yin, Xiuli.(2016).Single-walled carbon nanotubes prepared in small AlPO4-5 and CoAPO-5 molecular sieves by low-temperature hydrocracking.MICROPOROUS AND MESOPOROUS MATERIALS,219,87-92.
MLA Yang, Wenshen,et al."Single-walled carbon nanotubes prepared in small AlPO4-5 and CoAPO-5 molecular sieves by low-temperature hydrocracking".MICROPOROUS AND MESOPOROUS MATERIALS 219(2016):87-92.
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